Hi Thank you for asking HCM I have gone through your query.You should get rid off anxiety including performance anxiety and stress as those are major offenders in many.You can practice squeeze and stop technique and pelvic floor strengthening exercises like kegels.You can stimulate your wife to maximum before getting yourself stimulated.You can deviate your thought to something nonsexual when you about to near ejaculation.You can put on a condom or condom with anesthetic which will decrease the excessive stimulation on penis and there by prevent premature ejaculation.If all these not helping then you can approach a psychiatrist for behavioral therapy and medicinal management like antidepressants. SSRIs like paroxetine gives good results in many.Dapoxetine which is a short acting SSRI can be used when needed also.Hope this may help you. Let me know if you have any further query.